<template>
  <div class="_fd-struct-editor">
    <div ref="editor"></div>
  </div>
</template>

<script>
import 'codemirror/lib/codemirror.css'
import CodeMirror from 'codemirror/lib/codemirror'
import 'codemirror/mode/javascript/javascript'
import { toJSON } from '../utils/index'
import { defineComponent, markRaw } from 'vue'
import errorMessage from '../utils/message'
import { designerForm } from '../utils/form'
import beautify from 'js-beautify'

export default defineComponent({
  name: 'StructEditor',
  props: {
    modelValue: [Object, Array, Function],
    format: Boolean,
    defaultValue: {
      require: false
    }
  },
  emits: ['blur', 'focus', 'update:modelValue'],
  inject: ['designer', 'dialogId'],
  data() {
    return {
      editor: null,
      visible: false,
      err: false,
      oldVal: null
    }
  },
  computed: {
    t() {
      return this.designer.setupState.t
    }
  },
  watch: {
    modelValue(n) {
      if (this.editor) {
        const val = n ? this.toJson(n) : ''
        this.oldVal = val
        const scrollInfo = this.editor.getScrollInfo()
        const scrollTop = scrollInfo.top
        this.editor.setValue(val)
        this.editor.scrollTo(0, scrollTop)
      }
    }
  },
  mounted() {
    this.$nextTick(() => {
      this.load()
    })
  },
  methods: {
    toJson(val) {
      return this.format ? designerForm.toJson(val, 2) : toJSON(val)
    },
    load() {
      const val = this.modelValue ? this.toJson(this.modelValue) : ''
      this.oldVal = val
      this.$nextTick(() => {
        this.editor = markRaw(
          CodeMirror(this.$refs.editor, {
            lineNumbers: true,
            mode: 'javascript',
            lint: true,
            line: true,
            tabSize: 2,
            lineWrapping: true,
            value: val
              ? beautify.js(val, {
                  indent_size: '2',
                  indent_char: ' ',
                  max_preserve_newlines: '5',
                  indent_scripts: 'separate'
                })
              : ''
          })
        )
        this.editor.on('blur', () => {
          this.$emit('blur')
        })
        this.editor.on('focus', () => {
          this.$emit('focus')
        })
      })
    },
    save() {
      const str = (this.editor.getValue() || '').trim()
      let val
      try {
        val = new Function('return ' + str)()
      } catch (e) {
        console.error(e)
        errorMessage(this.t('struct.errorMsg'), this.dialogId)
        return false
      }
      if (this.validate && false === this.validate(val)) {
        this.err = true
        return false
      }
      this.visible = false
      if (this.toJson(val) !== this.oldVal) {
        this.$emit('update:modelValue', val)
      }
      return true
    }
  }
})
</script>

<style>
._fd-struct-editor {
  flex: 1;
  width: 100%;
}

._fd-struct-editor > div {
  height: 100%;
}
</style>
